Does how much or how well you sleep affect your heart and body stress levels?
Actigraphy-Based Sleep and Muscle Sympathetic Nerve Activity in Humans.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Scientists wanted to see if people who sleep less or have worse sleep quality have higher heart rates or more body stress signals when resting. They checked real sleep data from watches and measured heart and nerve activity in healthy adults.
Surprising Findings
No association between objectively measured sleep and key cardiovascular or stress markers
This contradicts widespread public health messaging and prior small studies linking short sleep to increased sympathetic activity and higher cardiovascular risk. Many assume poor sleep directly stresses the heart via the nervous system.
Practical Takeaways
If you're a healthy adult, don't panic if you occasionally sleep less or have inefficient sleep—this may not be harming your cardiovascular system at rest.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Scientists wanted to see if people who sleep less or have worse sleep quality have higher heart rates or more body stress signals when resting. They checked real sleep data from watches and measured heart and nerve activity in healthy adults.
Surprising Findings
No association between objectively measured sleep and key cardiovascular or stress markers
This contradicts widespread public health messaging and prior small studies linking short sleep to increased sympathetic activity and higher cardiovascular risk. Many assume poor sleep directly stresses the heart via the nervous system.
Practical Takeaways
If you're a healthy adult, don't panic if you occasionally sleep less or have inefficient sleep—this may not be harming your cardiovascular system at rest.
Publication
Journal
American journal of physiology. Regulatory, integrative and comparative physiology
Year
2024
Authors
Jeremy A. Bigalke, Ian M. Greenlund, Jennifer R. Bigalke, Jason R. Carter
Related Content
Claims (4)
Not getting enough sleep for a long time can rev up your body's stress system, making your heart beat faster and your blood vessels tighter, which over time can raise your blood pressure.
In healthy adults, how much or how well you sleep doesn’t seem to affect your resting heart or stress system — at least when sleep is measured objectively, which might mean earlier findings were off.
For healthy adults, how much you usually sleep doesn’t seem to affect your blood pressure, heart rate, or stress nerve activity — even if you sleep less than average.
For healthy adults, how well you sleep night after night — based on movement tracking — doesn't seem to affect your blood pressure, heart rate, or nervous system activity, even when we account for age, sex, and weight.